312 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



Perca triacantha Lacepede, Hist. Nat. Poiss., vol. 4, 1802, pp. 398, 424. 



"Collection cedee a la France par la Hollande." 

 Perca pentacantha Lacepede, Hist. Nat. Poiss., vol. 4, 1802, pp. 398, 424. 



"Collection ced6e a la France par la Hollande." 



Depth 2% to 3Vg; head 2\i to 2%, width 1% to 2%. Snout 4}/ 2 

 in head from snout tip; eye 4 to 5, 1 to 134 m snout, greater than 

 interorbital in young to 1^ in interorbital with age; maxillary reaches 

 % in eye in young to little beyond eye with age, expansion 1)4 to 

 134 in eye, length 2 in head from snout tip; teeth fine, in bands in 

 jaws, on vomer and palatines, none on tongue; interorbital 534 to 

 73^, little convex; preopercle edge with 3 rather large spines; 3 oper- 

 cular spines equidistant. Gill rakers 7 + 14, lanceolate, longest half 

 of gill filaments or 234 m e y e i 5 above and 7 below rudimentary. 



Scales 59 in lateral line to caudal base and 7 more on latter; 14 

 rows above, 27 rows below, 20 rows on predorsal to occiput, 15 to 18 

 rows on cheek to preopercle angle; muzzle, maxillary and interor- 

 bital naked. Fins, except spinous dorsal, with small scales basally. 

 Scales with 57 to 63 radiating striae; circuli moderately fine. 



D. VII, 13, 1, second spine 2% to 33^ in total head length, eighth 

 ray 2 to 23^; A. I, 9, 1, fourth ray 2 to 2}/%; caudal 13^ to 1%, con- 

 vex behind; least depth of caudal peduncle 2% to 2%; pectoral 1% 

 to \%; ventral 2 to 2\i. 



Dark brown generally, with about 5 whitish broad longitudinal 

 bands in young, which alternate and become narrow with age when 

 about 8 are formed. These lines all variable and not quite the same 

 on both sides of the same specimen. They are especially broken or 

 variously disconnected on head. Fins uniformly pale brown. 



Red Sea, Zanzibar, Natal, Madagascar, Mauritius, Seychelles, Cey- 

 lon, Andamans, East Indies, Philippines, Formosa, Japan, Australia, 

 Melanesia, Micronesia, Polynesia. According to Bleeker the white 

 longitudinal bands are 3 or 4 in the very young. 



(768). Sablayan, Mindoro. December 13, 1908. Length 62 mm. 

 56264 U.S.N.M. Bacon, Philippines. Bureau of Fisheries (3750). Length 75 mm. 

 32727 U.S.N.M. Indian Archipelago. Leiden Museum. Length 150 mm. 

 52392 U.S.N.M. Apia, Samoa. Bureau of Fisheries. Length 118 mm. 



Genus PLESIOPS Oken 



Plesiops Oken, Isis, 1817, p. 1182 (on Cuvieh, Regne Animal, vol. 2, 1817, p. 



266, atypic). Type Plesiops nigricans Ruppell, designated by Bleeker, 



Arch. N6erland. Sci. Nat. Haarlem, vol. 2, 1876, p. 322. 

 Pharopteryx Ruppell, Atlas Reise nordl. Afrika, Fische, 1828, p. 15. Type 



Pharopteryx nigricans Ruppell, monotypic. 

 Cirrhiptera (Kuhl and Van Hasselt) Bleeker, Nat. Tijds. Nederland. 



Indie, vol. 4, 1853, p. 280. Type Cirrhiptera corallicola (Van Hasselt) 



Bleeker, monotypic. (Name in synonymy.) 



Body well compressed. Mouth moderate, protractile. Maxillary 

 exposed, with supplemental bone. Jaws with villiform teeth and 



